Aesthetic polished Stromatolite slice from Colombia. Stromatolite is a particular fossil produced by sediment trapping or precipitation as a result of the growth of cyanophytes algae. It has a variety of gross forms, from nearly horizontal to markedly columnar, domal, or subspherical. Origin: Colombia Size: 13.2 X 12 X 0.9 Cm Please keep in mind that photos are taken inside a box with LED lights and that the colors may be slightly different. Detail photos are obviously enlarged to show the particularities at their best. If youd nee you can contact us to have videos of the piece taken in daylight